484333 經濟部智慧財產局員工消費合作社印製 A7 Β7 五、發明說明（1 ) 【本發明之領域】 本發明係有關一種無線網路之呼叫應許控制方法，尤 指一種用於叢集型態之微細胞或微微細胞無線網路之雙臨 界値呼叫應許控制方法。 【本發明之背景】 無線網路（W i r e 1 e s s N e t w 〇 r k )由於具有可提供使 用者可移動性無線通訊服務之方便性，故其普及率已快速 地成長，而隨著行動使用者數目之增長及寬頻服務之出 現’對於網路容量之需求亦隨之增加，為了在有限之無線 頻寬之下，提供較高之網路容量，微細胞或微微細胞 (micro/picocellular)架構之無線網路遂被提出，該等 架構由於具有較小之細胞（c e 11 )，故而擁有高處理量、 低傳輸電能需求及高無線頻率之重複使用率等優點。 而隨著細胞尺寸之減小，網路中之交遞（han(ίο ff ) 事件發 生之頻 率將因 此增加 ，此 將導 致增加 處理交 遞事件之化費’為解決此一問題，在已知之文獻中，484333 Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (1) [Field of the Invention] The present invention relates to a method for controlling call pledges in a wireless network, especially a micro-type for clustering. A dual-critical call promise control method for cellular or picocell wireless networks. [Background of the present invention] The wireless network (Wire 1 ess Netwk) has the convenience of providing users with mobile wireless communication services, so its penetration rate has grown rapidly, and with mobile users The increase in the number and the emergence of broadband services' The demand for network capacity has also increased. In order to provide higher network capacity under limited wireless bandwidth, microcells or picocellular architectures Wireless networks have been proposed. Because these architectures have smaller cells (ce 11), they have the advantages of high throughput, low transmission power requirements, and high wireless frequency reuse rates. As the cell size decreases, the frequency of handover (han (ίο ff)) events in the network will increase. This will increase the cost of handling handover events. To solve this problem, it is known that In the literature,
Posner及Guerin (參見：E· C. Posner and R. Guerin， ''Traffic Policies in cellular Radio that MinimizePosner and Guerin (see: EC Posner and R. Guerin, '' Traffic Policies in cellular Radio that Minimize
Blocling of Handoff Calls/fProc. 11th TeletraficBlocling of Handoff Calls / fProc. 11th Teletrafic
Cong. (ITC 11)，Kyoto，Japan，Sept. 1 985·)建議在 每一基地台中保留一定數目之防護通道（guard c h a η n e 1 )以供交遞呼叫使用，而新的呼叫僅能使用其餘 之通道’因此’當無剩餘之空閒通道時，網路便無法應許 新的呼叫之建jl，然而，當有作用中之呼叫交遞至鄰近的 本紙張尺度適用中國國家標準(CNS)A4規格（210 X 297厶釐） ------------------—訂---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 484333 A7 B7 五、發明說明（2 ) 細胞而釋放通道供新的呼叫使用時，既使網路負載極大， 網路仍會應許新的呼叫之建立，最終，部分之呼叫將因交 遞失落機率（hand-off dropping probability)之增力口 而阻塞（congested)。 此夕卜，Naghshineh及Acamporo則提出一種叢集型 態（c 1 u s t e r - b a s e d )之微細胞或微微細胞無線網路之呼 叫應許策略（參見：M. Naghshineh and A. S. Acamporo， Design and Control of Microcellular Networks with QOS Provisioning for RealtimeCong. (ITC 11), Kyoto, Japan, Sept. 1 985 ·) suggest to reserve a certain number of guard channels (guard cha η ne 1) in each base station for handing over calls, and new calls can only be used The remaining channels are 'so'. When there are no remaining idle channels, the network cannot promise the establishment of new calls. However, when an active call is delivered to the adjacent paper standard, China National Standard (CNS) A4 is applied. Specification (210 X 297mm) -------------------- Order --------- Line (Please read the precautions on the back before filling in this page ) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 484333 A7 B7 V. Description of the invention (2) When the cell releases the channel for new calls, even if the network is extremely loaded, the network will still allow the establishment of new calls. Eventually, part of the call will be congested due to the increase in hand-off dropping probability. In the meantime, Naghshineh and Acamporo proposed a clustered (c 1 uster-based) microcell or picocell wireless network call promise strategy (see: M. Naghshineh and AS Acamporo, Design and Control of Microcellular Networks with QOS Provisioning for Realtime
Traffic，’’ J. High-Speed Networks，vol. 4，no. 5, pp· 5 3-71，1 996.)，以將呼叫交遞失落機率及強制呼叫 終止機率（forced call termination probability )保 持在一預設値以下，其中，一個在叢集（cluster )階層 之應許臨界値（a d m i s s i ο n t h r e s h ο 1 d )係用以限定新呼 叫之許可與否，亦即，當有一呼叫產生時，如在叢集中作 用之呼叫數目為小於該應許臨界値，則網路將許可該呼叫 之建立，反之，該呼叫將被拒絕，而藉由適當地選取該應 許臨界値，可使呼叫交遞失落機率及強制呼叫終止機率不 會超出該預設値。此種策略雖可避免前述p〇sner及 Guerin所提方法之問題，然而，卻也造成另外之呼叫阻 塞的問題’亦即’由於新的呼叫係任意地產生，因此，在 一叢集中作用之呼叫數目超過該應許臨界値之前，叢集中 之部分呼叫有可能已經阻塞。由是可知，習知之無線網路 呼叫應許方法仍有其缺失，而有予以改進之必要。 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 X 297啓釐） --------------------訂--------- (請先閱讀背面之注意事項再填寫本頁) 484333 A7 B7 五、發明說明（3 ) (請先閱讀背面之注意事項再填寫本頁) 發明人爰因於此，本於積極發明之精神，亟思一種可 以解決上述問題之「叢集型態之微細胞或微微細胞無線網 路之雙臨界値呼叫應許控制方法」，幾經研究實驗終至完 成此項新穎進步之發明。 【本發明之概述】 本發明之目的係在提供一種叢集型態之微細胞或微微 細胞無線網路之雙臨界値呼叫應許控制方法，以降低交遞 失落機率，俾免除網路之呼叫阻塞及提升處理量。 經濟部智慧財產局員工消費合作社印製 為達前述之目的，本發明之呼叫應許控制方法係用於 叢集型態之微細胞或微微細胞無線網路中，以在一個新的 行動使用者抵達一細胞時，決定該行動使用者是否可被允 許進入該細胞，其中，一個叢集包含有複數個細胞，每一 細胞具有複數個通道，該方法係提供一個叢集階層臨界値 及一個細胞階層臨界値，以當在該細胞所屬叢集中之已佔 用頻道數目係小於該叢集階層臨界値，且在該細胞中之已 佔用頻道數目係小於該細胞階層臨界値之時，則該行動使 用者可被允許進入該細胞，否則該行動使用者被拒絕進入 該細胞。 由於本發明設計新穎，能提供產業上利用，且確有增 進功效，故依法申請專利。 為使貴審查委員能進一步瞭解本發明之結構、特徵 及其目的，茲附以圖式及較佳具體實施例之詳細説明如 后： 本紙張尺度適用中國國家標準（CNS)A4規格（210 x 297么釐） 484333 A7 B7 五、發明說明（斗） 【圖式簡單説明】 弟1圖·係為用以進行本發明之方法之無線網路系統架構 圖。 第2圖·係為第1圖之系統架構所提供之細胞的二維空間示 意圖。 第3圖·係顯示對所有叢集階層臨界値及細胞階層臨界値 之組合的漸進呼叫交遞失落機率。 第4圖·係顯示第3圖之漸進呼叫交遞失落機率的投射曲 線。 第5圖：係顯示對於所有叢集階層臨界値及細胞階層臨界 値的組合之每一通道的處理量（在每一通道之 Erlang負載為〇·95之條件下）。 第6圖：係顯示對於不同之漸進呼叫交遞失落機率之叢集 階層臨界値及細胞階層臨界値以及相應之最大處 理量 經濟部智慧財產局員工消費合作社印製 第7圖：係為依據本發明之呼叫應許策略與習知策略下 交遞失落機率比較圖。 第8圖：係為依據本發明之 — 十以又子叫應，午朿略與習知策略 每通道的成功機率比較圖。 第9圖··係為依據本發明之 β <于叫應泎朿略與習知 每通道的處理量比較圖。 【圖號説明 (1 1 )細胞 1 2 )基地台Traffic, ”J. High-Speed Networks, vol. 4, no. 5, pp · 5 3-71, 1 996.) to maintain the probability of missed calls and forced call termination probability Below a predetermined threshold, one of which is the threshold of promise (admissi ο nthresh ο 1 d) at the cluster level is used to limit the permission of new calls, that is, when a call is generated, as in If the number of calls in the cluster is less than the promised threshold, the network will allow the call to be established. Otherwise, the call will be rejected. By properly selecting the promised threshold, the call delivery probability and The probability of forced call termination will not exceed this preset. Although this strategy can avoid the problems of the aforementioned methods proposed by posner and Guerin, it also causes another problem of call blocking 'that is, because new calls are randomly generated, so they are concentrated in a cluster. Before the number of calls exceeds the promise threshold, some calls in the cluster may have been blocked. It can be seen that the conventional method of wireless network call promise is still lacking, and it is necessary to improve it. This paper size applies to China National Standard (CNS) A4 (21〇X 297 Qi Li) -------------------- Order --------- (Please read the notes on the back before filling this page) 484333 A7 B7 V. Description of the invention (3) (Please read the notes on the back before filling this page) Because of this, the inventor is in the spirit of active invention, It is an urgent need to think of a "bi-cluster micro-cell or pico-cell wireless network dual-critical call-promise control method" that can solve the above-mentioned problems. After several research experiments, this novel and progressive invention has been completed. [Summary of the present invention] The purpose of the present invention is to provide a clustered micro-cell or pico-cell wireless network with a dual-critical call admission control method to reduce the probability of loss of delivery and avoid network call blocking and Increase throughput. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to achieve the foregoing objectives, the call promise control method of the present invention is used in a clustered microcell or picocell wireless network to reach a new mobile user when a new mobile user arrives. When the cell determines whether the mobile user can be allowed to enter the cell, a cluster contains a plurality of cells, and each cell has a plurality of channels. The method provides a cluster level criticality and a cell level criticality. When the number of occupied channels in the cluster to which the cell belongs is less than the cluster hierarchy threshold, and the number of occupied channels in the cell is less than the cell hierarchy threshold, the mobile user may be allowed to enter The cell, otherwise the mobile user is denied access to the cell. Since the invention is novel in design, can provide industrial use, and does have an increasing effect, it has applied for a patent in accordance with the law. In order to enable your reviewers to further understand the structure, characteristics and purpose of the present invention, the drawings and detailed descriptions of the preferred embodiments are attached as follows: This paper size applies the Chinese National Standard (CNS) A4 specification (210 x 297 mm) 484333 A7 B7 V. Description of the Invention (Battle) [Brief Description of the Drawings] Figure 1 is a diagram of the architecture of a wireless network system for performing the method of the present invention. Figure 2 is a two-dimensional representation of the cells provided by the system architecture of Figure 1. Figure 3 shows the probability of a progressive call drop for all combinations of cluster-level criticality and cell-level criticality. Fig. 4 is a projection curve showing the probability of progressive call delivery drop in Fig. 3. Figure 5: Shows the throughput per channel for all combinations of cluster-level critical 値 and cell-level critical 値 (under the condition that the Erlang load of each channel is 0.95). Figure 6: Cluster level criticality and cell level criticality for different progressive call delivery loss rates and the corresponding maximum processing volume Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Figure 7: Based on the present invention Comparison chart of the probability of handover loss under the call promise strategy and the conventional strategy. Figure 8: This is a comparison chart of the success probability of each channel in accordance with the present invention. Fig. 9 is a comparison diagram of the processing capacity per channel according to the β < [Illustration of drawing number (1 1) cell 1 2) base station
Μ氏張尺度適用中國國家標準（CNS)A4規格ϋ; 297匕爱J 之 之 下之 --------------------訂--------- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 484333 Α7 _ Β7 五、發明說明（5) (1 3 )行動使用者 （1 4 )交換機 (1 5 )主幹網路 （1 6 )叢集 【較佳具體實施例之詳細説明】 有關本發明之叢集型態之微細胞或微微細胞無線網路 之雙臨界値呼叫應許控制方法，首先請參照第1圖所示之 無線網路系統架構圖，其中，系統之階系共包含有三個層 級，行動使用者1 3係在最底層，而上一層之每一細胞i i 内有一基地台1 2，以提供行動使用者1 3擷取無線通訊之 服務，在最上層中，數個前述基地台丨2係由一與有線之主 幹網路1 5連線之交換機1 4所控制。於此系統架構中，在 一個交換機1 4之控制下的數個基地台丨2所涵蓋之細胞的 集合係稱為一叢集1 6。 如述系統架構所提供之環境可視為一包含有多個細胞 之二維空間’而一般叢集丨6之形狀並非特定，且不同叢集 1 6所包含之細胞數亦可能不同，然為方便説明，如第2圖 所示’係假設叢集1 6為每邊具有w個細胞之等邊平行四邊 形，其中，W値至少為2，另於本發明之系統模型中，對 細胞之通道指派方式係採用固定通道指派策略，其中，每 一細胞内之通道數以c表示，因此，每一叢集16内之通道 數即為CW2 〇 本發明係在叢集型態之微細胞或微微細胞無線網路 中，以具有雙臨界値（thresh〇ld)之呼叫應許控制來減 V呼Η阻基之機率’其中之雙臨界值為叢集 臨値及 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 2971釐） --------------------訂--------- (請先閱讀背面之注意事項再填寫本頁) 484333 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（6 ) 細胞階層臨界値，而於本發明之方法中，當一個新的行動 使用者1 3抵達一細胞1 1時，如果在該細胞1 1所屬叢集1 6 中之已佔用頻道數目係小於該叢集階層臨界値，且在該細 胞1 1中之已佔用頻道數目係小於該細胞階層臨界値，則該 行動使用者1 3可被允許進入該細胞1 1，交遞呼叫复不被 該等臨界値所限制，而前述之叢集階層臨界値係用以減少 一個叢集1 6在大負載時變為阻塞之可能性，前述之細胞階 層臨界値則係用以減少細胞内之局部性阻塞的可能性。 反之，如果在該細胞1 1所屬叢集1 6中之已佔用頻道 數目係大於該叢集階層臨界値，或在該細胞1 1中之已佔用 頻道數目係大於該細胞階層臨界値，則該行動使用者將被 拒絕進入該細胞。 如將前述用於叢集1 6及細胞1 1之應許臨界値分別以τ 及t表示，則叢集階層臨界値τ係相等於或小於一個叢集中 之所有通道數C W2，而細胞階層臨界値t則係相等於或小 於一個細胞1 1中之通道數C，當τ == c W2時，即相當於在 叢集階層不採用任何臨界値，同樣地，當t = c時，即相當 於在細胞階層不採用任何臨界値，而為避免產生某些細2 11永不允許新呼叫建立之可能，t必須至少為i，而Τ必須 至少為W2。 藉由兩述叢集階層臨界値及細胞階層臨界値之使用， 可將啤叫之交遞失落機率限制在一預設之最大準位之下， 且能盡可能地提升網路之處理量，.而對於該等臨界値選 擇，首先，需找出在任意負载狀況下能夠滿足該預設之呼 (請先閱讀背面之注意事項再填寫本頁) 訂---------線赢 A7 五、發明說明（7 ) Η人遞失落機率的叢集階層臨界値及細胞階層臨界値之所 有、、且口，然後，再於該滿足呼叫交遞失落機率界限之組合 (請先閱讀背面之注意事項再填寫本頁) 中，找出一個可造成最大網路處理量之叢集階層臨界値及 細胞階層臨界値的組合。 舉例而言，假設一個系統之叢集16的每一邊的細胞數 W為7，而每一細胞内之通道數C為1 2 0，則對所有叢集階 層臨界値及細胞階層臨界値之組合的漸進 (asymptotic)呼叫交遞失落機率係如第3圖所示，如將 呼叫父遞失落機率為1〇-2、1〇·3、ι〇-4、ι〇·5、6、 ίο·7及ίο·8的曲線分別投射在叢集」細胞臨界値平面上， 則可獲致如第4圖所示之曲線圖，其中，每一曲線左側之 區域係包含可產生不超過相應於該曲線之漸進呼叫交遞失 落機率之呼叫交遞失落機率的所有叢集階層臨界値及細胞 1¾層臨界値的組合。 經濟部智慧財產局員工消費合作社印製 第5圖係在每一通道之ErUng負載為〇·95之條件下， 對於所有叢集階層臨界値及細胞階層臨界値的組合，纟會出 每一通道之處理量（thr〇ughput )，利用此圖所產生之 資料，便可由所有可能之組合中，獲致一個可造成最大網 路處理量之叢集階層臨界値及細胞階層臨界値的可能組 合，而其中所有可能之叢集階層臨界値及細胞階層臨界値 的組合係由第4圖所找出，再如第6圖所示，其顯示對於不 同之漸進呼叫交遞失落機率之叢集階層臨界値及細胞階層 臨界値，以及相應之最大處理量，圖中括弧内之兩數字即 分別為叢集階層臨界値及細胞階層臨界値。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297y公釐） 經濟部智慧財產局員工消費合作社印製 484333 A7 _;__ B7 五、發明說明（δ ) 為驗證本發明之方法的優異性，首先在相同之呼叫交 遞失落機率最大準位的條件下，比較本發明之呼叫應許策 略（以 cluster and cell thresh〇ids 表示）與 Naghshineh及Acamporo所提之習知策略（以ciuster threshold表示）的效能，其中，呼叫交遞失落機率之最 大準位係汉足為1 〇 5，一叢集丨6每邊之細胞數*為7，一 細胞内之通道數(：為120，而根據第6圖，在本發明之呼叫 4策各下’叢集階層臨界値及細胞階層臨界値係分別為 4984及97，而在習知之呼叫應許策略下，叢集階層臨界 値係為3964。 第7圖便同時顯示出在本發明之呼叫應許策略與習知 策略下之交遞失落機率，其顯示本發明之方法確可產生相 當低之交遞失落機率，而第8及9圖則進一步顯示本發明之 方法在負載較高時，可產生相當高之成功機率（The M's scale is applicable to the Chinese National Standard (CNS) A4 specifications; 297 or below J --------------------- Order ------ --- (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 484333 Α7 _Β7 V. Description of the invention (5) (1 3) Mobile users (1 4) Switch ( 1 5) Backbone network (16) cluster [Detailed description of the preferred embodiment] For the dual-critical 値 call promise control method of the cluster type microcell or picocell wireless network of the present invention, first refer to section The architecture diagram of the wireless network system shown in Figure 1, where the system hierarchy includes a total of three levels, mobile users 1 3 are at the lowest level, and each cell ii in the upper level has a base station 1 2 to It provides mobile users with a service for capturing wireless communications. In the uppermost layer, several of the aforementioned base stations are controlled by a switch 14 connected to a wired backbone network 15. In this system architecture, the set of cells covered by several base stations 2 under the control of a switch 14 is called a cluster 16. As mentioned above, the environment provided by the system architecture can be regarded as a two-dimensional space containing multiple cells, and the shape of a general cluster 6 is not specific, and the number of cells contained in different clusters 16 may also be different, but for convenience, As shown in FIG. 2 ', it is assumed that the cluster 16 is an equilateral parallelogram with w cells on each side, where W 値 is at least 2, and in the system model of the present invention, the channel assignment method for the cells adopts A fixed channel assignment strategy, where the number of channels in each cell is represented by c, so the number of channels in each cluster 16 is CW2. The present invention is in a clustered microcell or picocell wireless network. Probability of reducing V call resistance with call promise control with double threshold (Thresh ld), where the double threshold value is cluster copy and this paper size applies Chinese National Standard (CNS) A4 specification (210 X 2971) Li) -------------------- Order --------- (Please read the notes on the back before filling this page) 484333 Intellectual Property of the Ministry of Economic Affairs A7 B7 printed by the Bureau's Consumer Cooperatives V. Description of Invention (6) Cell Level Pro値, and in the method of the present invention, when a new mobile user 13 arrives at a cell 11, if the number of occupied channels in the cluster 16 to which the cell 11 belongs is smaller than the cluster hierarchy threshold 値, And the number of occupied channels in the cell 11 is less than the threshold of the cell hierarchy, then the mobile user 13 can be allowed to enter the cell 11 and the handover call is not limited by these thresholds, and The aforementioned cluster-level criticality is used to reduce the possibility that a cluster 16 becomes blocked under heavy load, and the aforementioned cell-level criticality is used to reduce the possibility of localized blockage within the cell. Conversely, if the number of occupied channels in the cluster 16 to which the cell 11 belongs is greater than the cluster hierarchy threshold, or the number of occupied channels in the cell 11 is greater than the cell hierarchy threshold, the action uses The person will be denied access to the cell. If the aforementioned promise thresholds for cluster 16 and cell 11 are expressed as τ and t, respectively, the cluster hierarchy threshold τ is equal to or less than the number of all channels C W2 in a cluster, and the cell hierarchy threshold 値 t Then it is equal to or less than the number of channels C in a cell 1 1. When τ == c W2, it is equivalent to not adopting any critical 値 at the cluster level. Similarly, when t = c, it is equivalent to the cell The hierarchy does not use any critical 値, and in order to avoid the possibility that some calls may never be allowed to be established, t must be at least i, and T must be at least W2. Through the use of two cluster level criticality and cell level criticality, the beer delivery loss probability can be limited to a preset maximum level, and the network throughput can be improved as much as possible. For these critical threshold selections, first of all, you need to find out that the preset call can be satisfied under any load condition (please read the precautions on the back before filling this page). Order --------- Line Win A7 V. Description of the invention (7) All the cluster-level criticality and cell-level criticality of the probability of loss of human handover, and then, and then the combination that meets the limit of probability of loss of call handover (please read the back Note on this page and then fill in this page) to find a combination of cluster-level criticality and cell-level criticality that can cause the largest network throughput. For example, assuming that the number of cells W on each side of cluster 16 in a system is 7, and the number of channels C in each cell is 1 2 0, the combination of all cluster-level criticality and cell-level criticality is progressive. (asymptotic) The probability of missed calls is shown in Figure 3. For example, the probability of missed calls by the parent is 10-2, 10.3, ι〇-4, ι〇5, 6, ίο · 7 and The curve of ίο · 8 is projected on the critical cell plane of the cluster, and the graph shown in Figure 4 can be obtained, where the area to the left of each curve contains a progressive call that can not exceed the corresponding curve. Call of the drop-off probability. A combination of all cluster-level criticality and cell 1¾-level criticality. Printed in Figure 5 by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, under the condition that the ErUng load of each channel is 0.95, for all the combinations of cluster-level criticality and cell-level criticality, there will be Throughput (throughput), using the data generated in this figure, from all possible combinations, a possible combination of cluster-level criticality and cell-level criticality that can cause the maximum network throughput can be obtained, and all of them The possible combinations of cluster-level criticality and cell-level criticality are found in Figure 4, and as shown in Figure 6, it shows the cluster-level criticality and cell-level criticality for different progressive call delivery miss rates.以及, and the corresponding maximum processing capacity, the two numbers in the parentheses in the figure are the cluster-level criticality and the cell-level criticality, respectively. This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297y mm) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 484333 A7 _; __ B7 V. Description of the Invention (δ) To verify the excellence of the method of the present invention First, under the same conditions of maximum call delivery loss probability, first compare the call promise strategy (represented by cluster and cell thresh〇ids) of the present invention with the conventional strategy (represented by ciuster threshold) proposed by Naghshineh and Acamporo. ), In which the highest level of missed call handover rate is 10.5, the number of cells on each side of a cluster 丨 6 * 7, the number of channels in a cell (: 120, and according to the Figure 6 shows that under the call 4 strategy of the present invention, the "cluster hierarchy criticality" and the cell hierarchy criticality are 4984 and 97 respectively, and under the conventional call promise strategy, the cluster hierarchy criticality is 3964. Fig. 7 At the same time, the probability of handover loss under the call promise strategy and the conventional strategy of the present invention is shown. It shows that the method of the present invention can indeed generate a relatively low handover loss probability. The method of the present invention shown in step higher load, may produce a very high probability of success (
Probility )及處理量。 综上所陳，本發明無論就目的、策略及功效，在在均 顯示其迥異於習知技術之特徵，為無線網路之呼叫應許控 制方法設計上之一大突破，懇請貴審查委員明察，早曰 賜准專利，俾嘉惠社會，實感德便。惟應注意的是，上述 諸多實施例僅係為了便於説明而舉例而已，本發明所主張 之權利範圍自應以申請專利範圍所述為準，而非僅限於上 述實施例。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 29/公釐） I----I — — — — — — t —-------- (請先閱讀背面之注意事項再填寫本頁)Probility) and throughput. In summary, the present invention, regardless of its purpose, strategy, and efficacy, shows its characteristics that are quite different from the conventional technology. It is a major breakthrough in the design of call promise control methods for wireless networks. As early as the grant of a quasi-patent, it will benefit the society and feel a sense of virtue. It should be noted that the above-mentioned embodiments are merely examples for the convenience of description. The scope of the claimed rights of the present invention should be based on the scope of the patent application, rather than being limited to the above-mentioned embodiments. This paper size applies to China National Standard (CNS) A4 (210 X 29 / mm) I ---- I — — — — — — t —-------- (Please read the precautions on the back first (Fill in this page again)